Wireless Power Transmitter Rogue Device Detection via Feedback
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Solution Overview
Problem
There is a lack of standards for wireless charging priority, detection of rogue devices, communication frequency selection, and power control in wireless power transmitters and receivers, leading to inefficiencies and potential power wastage.
Innovation Solution
A method and configuration for a wireless power transmitter to receive power consumption information from receivers, calculate power loss, and shut down transmission if it exceeds a threshold, using a communication unit and controller to manage power distribution and detect rogue devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wireless power transmission is implemented without standardized control, then wireless charging functionality is provided, but power loss and rogue device detection capability deteriorate
Solution Approach 1:
The transmitter controller receives power consumption information from the receiver and uses this feedback to calculate power loss. Based on the calculated power loss, the controller adjusts transmission power or shuts down transmission when power loss exceeds thresholds, enabling dynamic optimization of energy efficiency and rogue device detection
Solution Approach 2:
The system performs preliminary power loss calculation using received power consumption information before full power transmission begins. This preliminary assessment allows the system to identify potential rogue devices and adjust transmission parameters in advance, preventing excessive power loss
2Productivity
If continuous power transmission is performed, then charging speed is improved, but power wastage increases
Solution Approach 1:
The transmitter controller periodically receives power consumption information from the receiver and recalculates power loss at regular intervals. This periodic monitoring enables the system to maintain efficient charging speed while continuously adjusting transmission power to minimize power wastage based on current conditions
Solution Approach 2:
The system applies partial power transmission when power loss is within acceptable thresholds rather than full power transmission. When power loss exceeds thresholds, the system reduces to minimal necessary transmission or shuts down completely, avoiding excessive power delivery and resulting wastage
3Loss of energy
If power transmission is shut down when power loss exceeds threshold, then power wastage is reduced, but charging reliability deteriorates
Solution Approach 1:
The transmitter controller dynamically adjusts transmission power based on real-time power loss calculations. Rather than binary on/off control, the system modulates transmission power to maintain operation within acceptable power loss thresholds, ensuring both energy efficiency and charging reliability through continuous adaptation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the detection of rogue devices and prevents power wastage by ensuring efficient power transmission and reception, improving the overall reliability and efficiency of wireless charging systems.
Implementation Method 1
Electromagnetic induction-based power transmission means power transfer between primary and secondary coils. Current is induced when a magnet moves through a coil. Based on this principle, a transmitter creates a magnetic field and a receiver produces energy by current induced by a change in the magnetic field.
Implementation Method 2
a receiver produces energy by current induced by a change in the magnetic field. This phenomenon is known as magnetic induction, and power transmission based on magnetic induction is highly efficient in energy transfer.
Implementation Method 3
resonance-based wireless charging, in 2005, a system that enables wireless energy transfer from a charger at a distance of a few meters based on the resonance-based power transmission principle by the Coupled Mode Theory was disclosed. This wireless charging system employs the physics concept of resonance, by which when a tuning fork oscillates at a particular frequency, a wine glass next to the tuning fork will oscillate at the same frequency. An electromagnetic wave containing electrical energy was caused to resonate
Data Source
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Figure 2b~3
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AI summary
A wireless power transmitter, a wireless power receiver, and methods of controlling the same are provided. A method of detecting a rogue device other than a wireless power receiver in the wireless power transmitter includes receiving power consumption information about the wireless power receiver from the wireless power receiver, calculating a power loss based on the received power consumption information about the wireless power receiver, determining whether the power loss exceeds a threshold, and controlling transmission power of the wireless power transmitter, determining that a rogue device exists on the wireless power transmitter, if the power loss exceeds the threshold.